NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2014-04-10 437-588 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2014-04-10 571-510 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LEESBURG VA
2014-04-10 587-543 not yet reported which blocks → Comwave Networks 160G Fort McMurray —
2014-04-10 646-759 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2014-04-10 716-325 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E WANAKAH NY
2014-04-10 727-201 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E STPETERSBG FL
2014-04-10 727-228 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E CLEARWATER FL
2014-04-10 734-808 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DEXTER MI
2014-04-10 737-704 0–9 XXXall 10 · 2 holders which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 AUSTIN TX
2014-04-10 774-220 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MA 892D FOXBORO MA
2014-04-10 774-332 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MA 892D FOXBORO MA
2014-04-10 785-491 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABILENE KS
2014-04-10 786-681 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NORTH DADE FL
2014-04-10 786-708 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MIAMI FL
2014-04-10 813-563 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPANTH FL
2014-04-10 873-746 not yet reported which blocks → Bell Mobility 6574 Shawville —
2014-04-10 916-742 0–9 XXXall 10 · 5 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2014-04-10 929-273 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN13 NY
2014-04-10 936-305 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K NACOGDOCHS TX
2014-04-10 954-361 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E FTLAUDERDL FL
2014-04-10 984-255 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F RALEIGH NC
2014-04-09 204-671 not yet reported which blocks → Bell Mobility 6574 Gimli —
2014-04-09 210-503 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C SANANTONIO TX
2014-04-09 229-231 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E GEORGETOWN GA
2014-04-09 234-239 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CHATHAM OH
2014-04-09 234-351 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F BALTIC OH
2014-04-09 234-402 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F VALLEYCITY OH
2014-04-09 234-732 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F BOLIVAR OH
2014-04-09 248-532 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ORTONVILLE MI
2014-04-09 302-240 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DE 969E CAMDEN DE
2014-04-09 330-295 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F MANCHESTR OH
2014-04-09 385-355 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-04-09 419-379 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F FOSTORIA OH
2014-04-09 419-540 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F SYLVANIA OH
2014-04-09 470-249 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2014-04-09 520-539 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2014-04-09 587-356 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2014-04-09 587-526 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2014-04-09 757-330 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CAPECHARLS VA
2014-04-09 778-379 not yet reported which blocks → Shaw Telecom Inc. 497E Vancouver —
2014-04-09 857-377 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J BOSTON MA
2014-04-08 226-716 not yet reported which blocks → Comwave Networks 160G Alvinston —
2014-04-08 226-717 not yet reported which blocks → Comwave Networks 160G Port Lambton —
2014-04-08 226-718 not yet reported which blocks → Comwave Networks 160G Sarnia —
2014-04-08 226-719 not yet reported which blocks → Comwave Networks 160G Sombra —
2014-04-08 226-720 not yet reported which blocks → Comwave Networks 160G Watford —
2014-04-08 226-832 not yet reported which blocks → Comwave Networks 160G Tilbury —
2014-04-08 226-833 not yet reported which blocks → Comwave Networks 160G Wallaceburg —
2014-04-08 305-306 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2014-04-08 321-312 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MELBOURNE FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.